HI
I have a philips 23pf9956/79 television/monitor the problem being that when you switch it on it comes up with a 19" screen it should come to a 23" and after 5 minutes center top of screen it starts to quiver then 1 minute later a black line 2" wide from top to bottom of screen then after a few minutes black bar goes away then lines running down from top of screen to the botton of screen.
when you switch off then waite 5 minutes then switch on and same problem again can sombody please tell me what could be the problem
Give it the old slap test, when it does it slap it and see of it fixes it this could be due to a lot of things loose wire bad solder not an easy fix and for what a 25 inch cost it would be cheaper to buy a new one than have it repaired